What was found
FLIGHT 2166. CA REPORTS COCKPIT, COCKPIT ENTRY, AND R1 DOOR EMER LIGHTS WILL NOT EXTINGUISH. REMOVED FROM SERVICE.CHARGED ELPU'S IAW E175 AMM 33-50-01-800-801-A. NO HELP LIGHTS REMAIN ON. SUSPECT FAULTED FWD RH BATTERY PACK. REMOVED FWD RH BATTERY PACK S/N:059735 IAW E175 AMM 33-50-01-000-802-A. INSTALLED NEW BATTERY PACK (FWD RH) IAW E175 AMM 33-50-01-400-802-A. OPS TEST PASSED. ALL EMERGENCY LIGHTS TURN ON AND EXTINGUISH PROPERLY. NO INAPPROPRIATE EICAS MESSAGES OR FAULTS. AIRCRAFT OK FOR SERVICE.